This circuit for generating precise reference signals was found in the April 1973 issue of Radio Electronics magazine. The circuit generates 100 kHz signals according to the crystal used.
This circuit is from a 1975 publication. The components are from the time, and modern equivalents can be...
This battery-powered emergency light circuit was published in an April 1962 Radio Electronics...
This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today....